Field study in Cesena/Italy 2008 Claudio Venturelli, Dipartimento - - PowerPoint PPT Presentation

Field study in Cesena/Italy 2008

Claudio Venturelli, Dipartimento Sanità pubblica, Ausl Cesena, Italy Christian Engelbrecht, University Regensburg Germany Martin Geier, Biogents AG, Regensburg Germany

Control of Asian Tiger Mosquitoes by the use of Biogents Mosquito Traps

Location: Cesena/Italy, city with 100.000 people Time: June to October 2008 Study design:

Selection of 6 areas in Cesena where Asian Tiger mosquitoes (Aedes albopictus) occur. (Based on ovitrap measurements of the last years) 3 areas are randomly allocated to receive the treatment with traps, the other 3 areas are control areas where no traps are placed. The treatment sector receives 8 traps, placed outdoor, run constantly for 24h, from June to October. The control sector has no traps. Following parameters are measured in all sectors:

• Human landing rates (same person, 1h in the afternoon, every 5-7 days)
• 2 Ovitraps are placed in a sector, weekly collections

Intervention and control areas

Six areas with simlar environmental conditions have been selected

• Three intervention areas with placement of traps: red dots
• Three control areas without placement of traps: blue dots

Area 1: Treatment with traps

25 m

40m x 45m = 1800sqm

M

Biogents traps Ovitraps (for monitoring deposited eggs) Position, where human landing rates are measured

Area 2: Treatment with traps

60m x 50m = 3000 sqm

20 m

M

Biogents traps Ovitraps (for monitoring deposited eggs) Position, where human landing rates are measured

Area 3: Treatment with traps

113m x 55m = 6215 sqm

20 m

M M

Biogents traps Ovitraps (for monitoring deposited eggs) Position, where human landing rates are measured

Area 4: Control

30 m

M

Ovitraps (for monitoring deposited eggs) Position, where human landing rates are measured

Area 5: Control

30 m

M

Ovitraps (for monitoring deposited eggs) Position, where human landing rates are measured

Area 6: Control

30 m

M

Ovitraps (for monitoring deposited eggs) Position, where human landing rates are measured

5 10 15 20 25 30 35 40 45 20 25 30 35 40 45

May June July August September October

Mean human landings per hour

With traps No traps

Summary of all three areas: Reduction of human landing rates

Summary of all three areas: Reduction of egg production

200 400 600 800 1000 1200 28 33 38 43

Week Number of eggs in ovitraps With traps No traps

4950 759 Areas without traps 67,4 1612 Total number of colleceted eggs in

• vitraps

89,3 81 Total human landing counts Reduction in % Areas with traps From 1 August to 30 September

Summary